Daily NEET MCQ- April 29, 2022 - NEET MCQ

The formula for horizontal range is R = v²(sin 2θ)/g. This will be maximum when sin 2θ = 1, which implies that 2θ = 90°, which in turn implies that θ = 45°. Hence the correct answer is when θ = 45°.

Copper, gold, and water are pure but sugar solution is a homogeneous mixture. Copper, gold, and water are made of the same elements but sugar solution contains sugar as solute and water as a solvent.

Elements and Compounds together make pure substances, as they have fixed compositions.

Compound is a combination of two or more elements in a fixed ratio. Element is made up of the same atoms. Atom is the basic unit of life. Ion is either positively or negatively charged.

Julius Von Sachs found out that the pigment chlorophyll is present in chloroplast. Von Sachs in his experiment found out glucose stored in the form of starch. This led to the discovery of pigment chlorophyll in the chloroplast.

In a photosynthetic unit, 200 – 250 number of chlorophylls are present. They are embedded in the thylakoids of chloroplast. It differs for different plant species as in algae, it is only 100 in number. The number of chlorophylls is based on their requirement and function.

Methyl group CH₃ is mainly present in chlorophyll a. But in chlorophyll b, it has an aldehyde group in the C₇ position. Chlorophyll a and b structure mainly differs in the substituent of porphyrin.

In chloroplast, chlorophyll-a is more than chlorophyll b. They are not present in equal proportion. Since chlorophyll-a is the main chief pigment in photosynthesis, it is more in number. Chlorophyll b is less in number since it is only an accessory pigment.

Electron microscope is predominantly used for viewing of ultrastructure of cell and its organelles. Because it has great magnification and resolving power.

The body’s displacement is given by s = (1/2)at². Therefore, after putting in the values, we get, s = (1/2)(11î + 2ĵ)*10² = 550î + 100ĵ. The body initially starts from î + ĵ. Hence, the final position is = initial position + displacement = 551î + 101ĵ.